zapiska - most

Upload: alex-conev

Post on 18-Jul-2015

88 views

Category:

Documents


0 download

TRANSCRIPT

, : :4,. 14162 : . . . 2012 . lo = b/2 + + a + (H-50)*1,5 - 2l2 2,5 =410/2 + 780 + 260 + (530-50)*1,5 2*35 2,5=1982,5 c = + 2*50 + 2*20 + 2*2*75 = 1250 n= 8. b = B / n = 1250 / 8 = 156,25 ~ 160hk = lo / 13,51 = 140 chf = b/9 + 4 = 160/9 + 4 = 21,77 ~ 20 ch = hk - hf = 140 20 = 120 h1 = 60 nc = 4B = (nc 1)*L + 2*L/3 L = 340 c: 0, 20 0, 201, 2 1, 402 2 2 2f fNh hl l m + + + +

14162 2: : - 0, 2.25 5 / / kN m m - 0,12*22 2, 64 / / kN m m

7, 64 / / g kNmm : 1)LM11202004040aobo300 / 9 / /TS kN oUDL kN m m ,1,10,80, 8qQTS = 0,8*300 / 2 = 120 kN UDL = 0,8 * 9 = 7,2 kN/m/ma = ao + 2hp + hf = 40 + 2*12 + 20 = 84cmb = bo + 2hp + hf= 40 + 2*12 + 20 = 84cm2) LM214162 36035200ao=bo=4000, 8kQQ kN 35 2.12 20 7960 2.12 20 104a cmb cm + + + + Qk = 0,8*400 / 2 = 160 kN: : * M 2 2,1 1. .7, 64.1, 4 1,87 / '8 8g k kM g l kNm m * M 1) LM11 2 211 1. *7, 2*1, 4 1, 764 / '8 8LMUDL kM g l kNm m 14162 4{sup14084 1194 484spaneffeffL a cm a cm + + ' 2/ 2 240/ 2120, 05 /. 0, 84*1,19ikeq spaneffQq kN mb a 1(0, 35 0,14) *0, 42. 120, 05* *2 24, 71 / '2LMTS eqM q w kNm m+ 2) LM2{sup14079 1144 479spaneffeffL a cm a cm + + ' 2/ 2 320/ 2134, 95 /. 1, 04*1,14ikeq spaneffQq N mb a 2(0, 35 0, 09).0, 52. 134, 95. .2 30,88 / '2LMTS eqM q w kNm m+ * 1 11, 35. 1, 35.( ) 1, 35.1,87 1, 35.(1, 764 24, 71) 38, 26 / 'I LM LMULS gk UDL TSM M M M kNm m + + + + 14162 521, 35. 1, 35. 1, 35*1, 87 1, 35*30,88 44, 21 / 'II LMULS gk TSM M M kNm m + + max( , ) 44, 21 / 'I IIEd ULS ULSM M M kNm m * M : * n(l ) (1, 2 0,16). 7, 64. 3, 972 2gk kdV g kN * 1) LM111( ) (1, 2 0,16). 7, 2* 3, 742 2LMUDL kl dV g kN 14162 6{sup12084 1144 484spaneffeffL a cm a cm + + ' 11 1 1,122 2 21 21 1 1 2 2120 10. *0, 07 10 9,35 /0,84 1,07120 110. *0, 77 110 96, 49 /0,84 1,140,9042;0,5541. . 9,35*0,9042 96, 49*0,5541 61,92 / 'effeffTSQ QQ b kN q kN mb aQ QQ b N q kN mb aV q q kN m + + 2) LM2d = hf cnom = 20 4 = 16 cm {sup12079 1094 479spaneffeffL a cm a cm + + ' .2ik iiQ bQb ;13200, 07. 10, 772 1, 04Q kN 23200, 90. 138, 462 1, 04Q kN 33200, 07. 10, 772 1, 04Q kN 14162 7,1,ieqeff iQqa;,110, 7710, 56 /1, 02eqq kN m ,2138, 46127, 03 /1, 09eqq kN m

,310, 7710, 56 /1, 02eqq kN m

. 10, 77*0, 9041 127, 03*0, 5 10, 77*0, 0958 74, 28i iV q kN + + * 1 11, 35. 1, 35.( ) 1, 35*3, 97 1, 35*(3, 74 61, 92) 94, 00I LM LMULS gk UDL TSV V V V kN + + + + 21, 35. 1, 35. 1, 35*3, 97 1, 35*74, 28 105, 64II LMULS gk TSV V V kN + + max( , ) 113, 35I IIEd ULS ULSV V V kN : C30/37:fck = 30 MPafcd = * fck / = 0,85 * 30 / 1,15 = 22,17 MPa : B500fyd = 500 / 1,5 = 435 MPad = hf 4 = 20 4 = 16 cm: : 6,2 262,22,105*100, 039* * 1000*160*22, 20, 980222,105*10324, 02 / '* * 0, 9802*160*435Ed spanEdcdEds reqydMmbd fMA mm md f N8, As,1 = 50,3 mm2 n = As,req / As,1 = 324,02 / 50,3 = 6,44/ mnokon = 9,0625 * 6,44 = 59. 59N8/15,5As,min = 0,26 * b * d * fctm / fyk = 0,26 * 1000 * 160 * 2,9 / 500 = 241,28 mm2/mAs,min = 0,0013 * b * d = 0,0013 * 1000 * 160 = 208 mm2/mAs,max = 0,02 * b* d = 0,02 * 1000 * 160 = 3200 mm2/mAs,min < s,req = As,prov = 324,02 < As,max: 6,sup2 262,30, 947*100, 053* * 1000*160*22, 20, 971930, 947*10457, 48 / '* * 0, 9719*160*435EdEdcdEds reqydMmbd fMA mm md f N10, As,1 = 78,5 mm2 n = As,req / As,1 = 457,48 / 78,5 = 5,83/ m14162 8nokon = 9,0625 * 5,83 = 53. 53N10/17As,min = 0,26 * b * d * fctm / fyk = 0,26 * 1000 * 160 * 2,9 / 500 = 241,28 mm2As,min = 0,0013 * b * d = 0,0013 * 1000 * 160 = 208 mm2As,max = 0,02 * b* d = 0,02 * 1000 * 160 = 3200 mm2As,min < s,req = As,prov = 457,48 < As,max VEd = 113,35 kN1/ 3, , min(100 )rd c rd c ckV C k f bd V bd ,457, 480, 00286* 1000*160s provAbd 200 2001 1 2,12 2 _ 2160k kd + + > Vrd,c= 0,12 * 2 * (100 * 0,00286 * 30)1/3 * 1000 * 160 = 78612,87N = 78,61kNVmin*bd= 0,542 * 1000 * 160 = 86720N = 86,72kN113,35>86,72 min Ved V bd > Vrd,c = VEd = 113,35 kN 0,12 * 2 * (100 * * 30)1/3 * 1000 * 160 = 113350 N = 0,00857 As,req = * b*d = 0,00857 * 1000 * 160 = 1371,2 mm 2 N16, As,1 = 254,5 mm2 n = As,req / As,1 = 1371,2 / 254,5 = 5,38/ m~ 6/ m nokon = 9,8625 * 6 = 59,175. 60N14/16 I. : 1. (I): 14162 93/ 2 0,5 3/ 2 1/ 2 2min 0, 035 0, 035*2 *30 0, 542 /ckV k f N mm Nb [cm]h [cm] A [cm2] Xc [m] Yc [m] A*Yc Iy' [cm4] A*(y)2Iy [cm4]1 20 118 2360 0 59 1392402738386,67 249310,50 2987697 WbI=121044,8cm32 22,5 25 562,5 -21,25 12,5 7031,25 29296,88 738013,25767310,1 WbI=85128,27cm33 22,5 25 562,5 21,25 12,5 7031,25 29296,88 738013,25767310,14 22,5 10 112,5 -17,5 28,333 3187,4625 625,00 46766,9147391,915 22,5 10 112,5 17,5 28,333 3187,4625 625,00 46766,9147391,916 10 15 150 -15 110,5 16575 2812,50 572480,68575293,27 10 15 150 15 110,5 16575 2812,50 572480,68575293,28 10 5 25 -13,33 99,667 2491,675 34,72 64885,1764919,899 10 5 25 13,33 99,667 2491,675 34,72 64885,1764919,89A= 4060 m2197810,775 Iy, = 5897527 cm4Yc= 48,7 cmXc= 0 cm25325IA cm ,2..( )j ijc IjI Ix xj j c cjA yyAI I A y y 1 + ]

IIb IIWzIIt IIWz14162 102.(II): N b [cm]h [cm]A [cm2] Xc [m] Yc [m] A*Yc Iy' [cm4] A*(y)2Iy [cm4]1 20 118 2360 0 59 1392402738386,671435780,95 4174168 WbII=326332,5cm32 22,5 25 562,5 -21,25 12,5 7031,25 29296,88 738013,25767310,1WtbII= 795195,9cm33 22,5 25 562,5 21,25 12,5 7031,25 29296,88 738013,25767310,1WtpII= 502492,6cm34 22,5 10 112,5 -17,5 28,333 3187,4625 625,00 46766,9147391,915 22,5 10 112,5 17,5 28,333 3187,4625 625,00 46766,9147391,916 10 15 150 -15 110,5 16575 2812,50 572480,68575293,27 10 15 150 15 110,5 16575 2812,50 572480,68575293,28 10 5 25 -13,33 99,667 2491,675 34,72 64885,1764919,899 10 5 25 13,33 99,667 2491,675 34,72 64885,1764919,89 160 20 3200 0 128 409600 106666,6720112072,2220218739= A= 7260 m2607410,775 Iy, =27302737 cm4Yc= 83,7 cmXc= 0 cm

83, 7IIy IIb IIIISz 34, 3IIy IItb IIIISz 54, 3IIy IItp IIIISz 3.: + + 1 + + + + ],3 32 2 2 4.62.40.32 946,25.20.7267,37 62.40 946,25.2040.62 946,25.20.( ) 2480.36,37 18925.4,63 511144012 12j ijc IjItr xj j c cjA yy cmAI I A y y m14162 11II. . : 1. : 2.N 1 3 1 -g1 0,53x25=13,310,53x25=13,312 -g2 0,29x25=7,25 0,32x25=83 0,41x25=10,75 0,15x25=3,75 - 1 - 1 0,19x22=4,22 - g3 16,5 4,223. : 3.1. : - , ; . 14162 12( ) ( )42 , 01120 800 480 160 2112081212 2 2 22242322212111+ + ++ + + ++ b b b bbnR( ) ( )17 , 01120 800 480 160 2112081212 2 2 22242322212118 + + + + + + b b b bbnR( ) ( ) + + + + + + + +1 2212 2 2 2 2 2 2 21 2 3 41 . 1 1120.4800,258 2 2 160 480 800 1120bbRn b b b b( ) ( ) + + + + + +1 3282 2 2 2 2 2 2 21 2 3 41 . 1 1120.48008 2 2 160 480 800 1120b bRn b b b b + + + 1 1(0,31 0,2) (0,15 0,05) 0,3222 3SPANTSK 0SUPTSK 14162 13w1w2++ + + + + (0,45 0,34) (0,34 0,18) (0,18 0,02)0,42* * 2,2 1,00* * 3 0,35* * 3 1,252 2 2fkSPANUDL qK+ 2,2* 1,40,42* 0,6472fkSUPUDL qK1 TS 0,322 0UDL+qfk 1,444 0,6473.2. : 1 14162 14 ++++ + +:480* * 480* 20,94* 0,080 804,096480* * 480* 67,15* 0,322 10378,704480* * 480* 89,54* 0,322 13839,302:20,94* (0,845* 2 0,647)* 1,186[20,94* 0,845 (0,845 1,444)* (20,94* 16,77,2*a a ab b bc c credfkaTSM m kM m kM m kUDL qM + + ' ; + + + + + + + 5) 1,444* 16,75]* 3,5512561,444* (16,75 5,58)* 9,4625 5,58* (2* 1,444 0,647)* 4,731252 67,2* {9,6242 499,9785 152,6669 15,5542} 4880,33+ + + ' ;+ + + + 67,15* (2* 1,444 0,647)* 4,73125 1,444* (67,15 22,38)* 9,46256 27,2*22,38* (2* 1,444 0,647)* 4,7312567,2* {187,1803 6111,6622 62,3841} 6200,83bM14162 15{ }+ + + + 44,77* (2* 1,444 0,647)* 4,73125 1,444* (89,54 44,77)* 4,731257,2* 2*6 27,2* 2* {124,796 458,798} 8403,75cM1 :480* * 480* 0,933* 0,080 35,827480* * 480* 0,750* 0,322 115,920480* * 480* 0,500* 0,322 77,280a a ab b bc c cTSV v kV v kV v k14162 16++ + + + ' ;+ + + + + + +:(0,933* 0,845 (0,933 0,75)* (0,845 1,444) 1,444* 0,75)* 3,5512567,2*1,444* (0,75 0,25)* 9,4625 0,25* (2* 1,444 0,647)* 4,731252 67,2* (2,936 6,832 0,697) 75,3481,444* (0,75 07,2*redfkabUDL qVV{ }{ }++ + + + + + ,25)* 9,4625 0,25* (2* 1,444 0,647)* 4,731252 67,2* {6,832 0,697} 54,2091,444* (0,5 0,25)* 4,73125 0,25* (2* 1,444 0,647)* 4,731257,2*2 67,2* {2,562 0,697} 23,465cV14162 17